CVE-2026-4711 Details
Description
Use-after-free in the Widget: Cocoa component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
A use-after-free vulnerability has been identified in the Widget: Cocoa component of Mozilla Firefox. This issue affects Firefox versions prior to 149 and Firefox ESR versions prior to 140.9. The vulnerability arises from improper memory management, which can lead to memory corruption and potentially allow for arbitrary code execution.
Users can upgrade to Firefox 149 or Firefox ESR 140.9 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 25, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
| CWE-416 | Use After Free | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| mozilla firefox | < 140.9.0 < 149.0 |
CPE
Remediation
| |
Change History
7 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Apr 13, 2026 | CVE Modified | [email protected] |
| Mar 25, 2026 | CVE Modified | CISA-ADP |
| Mar 24, 2026 | CVE Modified | [email protected] |
| Mar 24, 2026 | Initial Analysis | [email protected] |
| Mar 24, 2026 | New CVE Received | [email protected] |